source: trunk/libs/newlib/src/include/opcode/crx.h @ 507

Last change on this file since 507 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 11.5 KB
Line 
1/* crx.h -- Header file for CRX opcode and register tables.
2   Copyright 2004, 2010, 2012 Free Software Foundation, Inc.
3   Contributed by Tomer Levi, NSC, Israel.
4   Originally written for GAS 2.12 by Tomer Levi, NSC, Israel.
5   Updates, BFDizing, GNUifying and ELF support by Tomer Levi.
6
7   This file is part of GAS, GDB and the GNU binutils.
8
9   GAS, GDB, and GNU binutils is free software; you can redistribute it
10   and/or modify it under the terms of the GNU General Public License as
11   published by the Free Software Foundation; either version 3, or (at your
12   option) any later version.
13
14   GAS, GDB, and GNU binutils are distributed in the hope that they will be
15   useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   GNU General Public License for more details.
18
19   You should have received a copy of the GNU General Public License
20   along with this program; if not, write to the Free Software
21   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22   MA 02110-1301, USA.  */
23
24#ifndef _CRX_H_
25#define _CRX_H_
26
27/* CRX core/debug Registers :
28   The enums are used as indices to CRX registers table (crx_regtab).
29   Therefore, order MUST be preserved.  */
30
31typedef enum
32  {
33    /* 32-bit general purpose registers.  */
34    r0, r1, r2, r3, r4, r5, r6, r7, r8, r9,
35    r10, r11, r12, r13, r14, r15, ra, sp,
36    /* 32-bit user registers.  */
37    u0, u1, u2, u3, u4, u5, u6, u7, u8, u9,
38    u10, u11, u12, u13, u14, u15, ura, usp,
39    /* hi and lo registers.  */
40    hi, lo,
41    /* hi and lo user registers.  */
42    uhi, ulo,
43    /* Processor Status Register.  */
44    psr,
45    /* Interrupt Base Register.  */
46    intbase,
47    /* Interrupt Stack Pointer Register.  */
48    isp,
49    /* Configuration Register.  */
50    cfg,
51    /* Coprocessor Configuration Register.  */
52    cpcfg,
53    /* Coprocessor Enable Register.  */
54    cen,
55    /* Not a register.  */
56    nullregister,
57    MAX_REG
58  }
59reg;
60
61/* CRX Coprocessor registers and special registers :
62   The enums are used as indices to CRX coprocessor registers table
63   (crx_copregtab). Therefore, order MUST be preserved.  */
64
65typedef enum
66  {
67    /* Coprocessor registers.  */
68    c0 = MAX_REG, c1, c2, c3, c4, c5, c6, c7, c8,
69    c9, c10, c11, c12, c13, c14, c15,
70    /* Coprocessor special registers.  */
71    cs0, cs1 ,cs2, cs3, cs4, cs5, cs6, cs7, cs8,
72    cs9, cs10, cs11, cs12, cs13, cs14, cs15,
73    /* Not a Coprocessor register.  */
74    nullcopregister,
75    MAX_COPREG
76  }
77copreg;
78
79/* CRX Register types. */
80
81typedef enum
82  {
83    CRX_R_REGTYPE,    /*  r<N>    */
84    CRX_U_REGTYPE,    /*  u<N>    */
85    CRX_C_REGTYPE,    /*  c<N>    */
86    CRX_CS_REGTYPE,   /*  cs<N>   */
87    CRX_CFG_REGTYPE   /*  configuration register   */
88  }
89reg_type;
90
91/* CRX argument types :
92   The argument types correspond to instructions operands
93
94   Argument types :
95   r - register
96   c - constant
97   i - immediate
98   idxr - index register
99   rbase - register base
100   s - star ('*')
101   copr - coprocessor register
102   copsr - coprocessor special register.  */
103
104typedef enum
105  {
106    arg_r, arg_c, arg_cr, arg_ic, arg_icr, arg_sc,
107    arg_idxr, arg_rbase, arg_copr, arg_copsr,
108    /* Not an argument.  */
109    nullargs
110  }
111argtype;
112
113/* CRX operand types :
114   The operand types correspond to instructions operands.  */
115
116typedef enum
117  {
118    dummy,
119    /* 4-bit encoded constant.  */
120    cst4,
121    /* N-bit immediate.  */
122    i16, i32,
123    /* N-bit unsigned immediate.  */
124    ui3, ui4, ui5, ui16,
125    /* N-bit signed displacement.  */
126    disps9, disps17, disps25, disps32,
127    /* N-bit unsigned displacement.  */
128    dispu5, 
129    /* N-bit escaped displacement.  */
130    dispe9,
131    /* N-bit absolute address.  */
132    abs16, abs32,
133    /* Register relative.  */
134    rbase, rbase_dispu4,
135    rbase_disps12, rbase_disps16, rbase_disps28, rbase_disps32,
136    /* Register index.  */
137    rindex_disps6, rindex_disps22,
138    /* 4-bit genaral-purpose register specifier.  */
139    regr, 
140    /* 8-bit register address space.  */
141    regr8,
142    /* coprocessor register.  */
143    copregr, 
144    /* coprocessor special register.  */
145    copsregr,
146    /* Not an operand.  */
147    nulloperand,
148    /* Maximum supported operand.  */
149    MAX_OPRD
150  }
151operand_type;
152
153/* CRX instruction types.  */
154
155#define NO_TYPE_INS       0
156#define ARITH_INS         1
157#define LD_STOR_INS       2
158#define BRANCH_INS        3
159#define ARITH_BYTE_INS    4
160#define CMPBR_INS         5
161#define SHIFT_INS         6
162#define BRANCH_NEQ_INS    7
163#define LD_STOR_INS_INC   8
164#define STOR_IMM_INS      9
165#define CSTBIT_INS       10
166#define COP_BRANCH_INS   11
167#define COP_REG_INS      12
168#define COPS_REG_INS     13
169#define DCR_BRANCH_INS   14
170
171/* Maximum value supported for instruction types.  */
172#define CRX_INS_MAX     (1 << 4)
173/* Mask to record an instruction type.  */
174#define CRX_INS_MASK    (CRX_INS_MAX - 1)
175/* Return instruction type, given instruction's attributes.  */
176#define CRX_INS_TYPE(attr) ((attr) & CRX_INS_MASK)
177
178/* Indicates whether this instruction has a register list as parameter.  */
179#define REG_LIST        CRX_INS_MAX
180/* The operands in binary and assembly are placed in reverse order.
181   load - (REVERSE_MATCH)/store - (! REVERSE_MATCH).  */
182#define REVERSE_MATCH  (1 << 5)
183
184/* Kind of displacement map used DISPU[BWD]4.  */
185#define DISPUB4        (1 << 6)
186#define DISPUW4        (1 << 7)
187#define DISPUD4        (1 << 8)
188#define DISPU4MAP      (DISPUB4 | DISPUW4 | DISPUD4)
189
190/* Printing formats, where the instruction prefix isn't consecutive.  */
191#define FMT_1          (1 << 9)   /* 0xF0F00000 */
192#define FMT_2          (1 << 10)   /* 0xFFF0FF00 */
193#define FMT_3          (1 << 11)   /* 0xFFF00F00 */
194#define FMT_4          (1 << 12)   /* 0xFFF0F000 */
195#define FMT_5          (1 << 13)   /* 0xFFF0FFF0 */
196#define FMT_CRX        (FMT_1 | FMT_2 | FMT_3 | FMT_4 | FMT_5)
197
198/* Indicates whether this instruction can be relaxed.  */
199#define RELAXABLE      (1 << 14)
200
201/* Indicates that instruction uses user registers (and not
202   general-purpose registers) as operands.  */
203#define USER_REG       (1 << 15)
204
205/* Indicates that instruction can perfom a cst4 mapping.  */
206#define CST4MAP        (1 << 16)
207
208/* Instruction shouldn't allow 'sp' usage.  */
209#define NO_SP          (1 << 17)
210
211/* Instruction shouldn't allow to push a register which is used as a rptr.  */
212#define NO_RPTR        (1 << 18)
213
214/* Maximum operands per instruction.  */
215#define MAX_OPERANDS      5
216/* Maximum register name length. */
217#define MAX_REGNAME_LEN   10
218/* Maximum instruction length. */
219#define MAX_INST_LEN      256
220
221
222/* Values defined for the flags field of a struct operand_entry.  */
223
224/* Operand must be an unsigned number.  */
225#define OP_UNSIGNED   (1 << 0)
226/* Operand must be a signed number.  */
227#define OP_SIGNED     (1 << 1)
228/* A special arithmetic 4-bit constant operand.  */
229#define OP_CST4       (1 << 2)
230/* A special load/stor 4-bit unsigned displacement operand.  */
231#define OP_DISPU4     (1 << 3)
232/* Operand must be an even number.  */
233#define OP_EVEN       (1 << 4)
234/* Operand is shifted right.  */
235#define OP_SHIFT      (1 << 5)
236/* Operand is shifted right and decremented.  */
237#define OP_SHIFT_DEC  (1 << 6)
238/* Operand has reserved escape sequences.  */
239#define OP_ESC        (1 << 7)
240/* Operand is used only for the upper 64 KB (FFFF0000 to FFFFFFFF).  */
241#define OP_UPPER_64KB (1 << 8)
242
243/* Single operand description.  */
244
245typedef struct
246  {
247    /* Operand type.  */
248    operand_type op_type;
249    /* Operand location within the opcode.  */
250    unsigned int shift;
251  }
252operand_desc;
253
254/* Instruction data structure used in instruction table.  */
255
256typedef struct
257  {
258    /* Name.  */
259    const char *mnemonic;
260    /* Size (in words).  */
261    unsigned int size;
262    /* Constant prefix (matched by the disassembler).  */
263    unsigned long match;
264    /* Match size (in bits).  */
265    int match_bits;
266    /* Attributes.  */
267    unsigned int flags;
268    /* Operands (always last, so unreferenced operands are initialized).  */
269    operand_desc operands[MAX_OPERANDS];
270  }
271inst;
272
273/* Data structure for a single instruction's arguments (Operands).  */
274
275typedef struct
276  {
277    /* Register or base register.  */
278    reg r;
279    /* Index register.  */
280    reg i_r;
281    /* Coprocessor register.  */
282    copreg cr;
283    /* Constant/immediate/absolute value.  */
284    long constant;
285    /* Scaled index mode.  */
286    unsigned int scale;
287    /* Argument type.  */
288    argtype type;
289    /* Size of the argument (in bits) required to represent.  */
290    int size;
291  /* The type of the expression.  */
292    unsigned char X_op;
293  }
294argument;
295
296/* Internal structure to hold the various entities
297   corresponding to the current assembling instruction.  */
298
299typedef struct
300  {
301    /* Number of arguments.  */
302    int nargs;
303    /* The argument data structure for storing args (operands).  */
304    argument arg[MAX_OPERANDS];
305/* The following fields are required only by CRX-assembler.  */
306#ifdef TC_CRX
307    /* Expression used for setting the fixups (if any).  */
308    expressionS exp;
309    bfd_reloc_code_real_type rtype;
310#endif /* TC_CRX */
311    /* Instruction size (in bytes).  */
312    int size;
313  }
314ins;
315
316/* Structure to hold information about predefined operands.  */
317
318typedef struct
319  {
320    /* Size (in bits).  */
321    unsigned int bit_size;
322    /* Argument type.  */
323    argtype arg_type;
324    /* One bit syntax flags.  */
325    int flags;
326  }
327operand_entry;
328
329/* Structure to hold trap handler information.  */
330
331typedef struct
332  {
333    /* Trap name.  */
334    char *name;
335    /* Index in dispatch table.  */
336    unsigned int entry;
337  }
338trap_entry;
339
340/* Structure to hold information about predefined registers.  */
341
342typedef struct
343  {
344    /* Name (string representation).  */
345    char *name;
346    /* Value (enum representation).  */
347    union
348    {
349      /* Register.  */
350      reg reg_val;
351      /* Coprocessor register.  */
352      copreg copreg_val;
353    } value;
354    /* Register image.  */
355    int image;
356    /* Register type.  */
357    reg_type type;
358  }
359reg_entry;
360
361/* Structure to hold a cst4 operand mapping.  */
362
363/* CRX opcode table.  */
364extern const inst crx_instruction[];
365extern const int crx_num_opcodes;
366#define NUMOPCODES crx_num_opcodes
367
368/* CRX operands table.  */
369extern const operand_entry crx_optab[];
370
371/* CRX registers table.  */
372extern const reg_entry crx_regtab[];
373extern const int crx_num_regs;
374#define NUMREGS crx_num_regs
375
376/* CRX coprocessor registers table.  */
377extern const reg_entry crx_copregtab[];
378extern const int crx_num_copregs;
379#define NUMCOPREGS crx_num_copregs
380
381/* CRX trap/interrupt table.  */
382extern const trap_entry crx_traps[];
383extern const int crx_num_traps;
384#define NUMTRAPS crx_num_traps
385
386/* cst4 operand mapping.  */
387extern const int cst4_map[];
388extern const int cst4_maps;
389
390/* Table of instructions with no operands.  */
391extern const char* no_op_insn[];
392
393/* Current instruction we're assembling.  */
394extern const inst *instruction;
395
396/* A macro for representing the instruction "constant" opcode, that is,
397   the FIXED part of the instruction. The "constant" opcode is represented
398   as a 32-bit unsigned long, where OPC is expanded (by a left SHIFT)
399   over that range.  */
400#define BIN(OPC,SHIFT)  (OPC << SHIFT)
401
402/* Is the current instruction type is TYPE ?  */
403#define IS_INSN_TYPE(TYPE)            \
404  (CRX_INS_TYPE(instruction->flags) == TYPE)
405
406/* Is the current instruction mnemonic is MNEMONIC ?  */
407#define IS_INSN_MNEMONIC(MNEMONIC)    \
408  (strcmp(instruction->mnemonic,MNEMONIC) == 0)
409
410/* Does the current instruction has register list ?  */
411#define INST_HAS_REG_LIST             \
412  (instruction->flags & REG_LIST)
413
414/* Long long type handling.  */
415/* Replace all appearances of 'long long int' with LONGLONG.  */
416typedef long long int LONGLONG;
417typedef unsigned long long ULONGLONG;
418
419#endif /* _CRX_H_ */
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